Roach · Rutilus rutilus

Roach in the Fleet

Largest measured roach: 16.9 cm

The largest roach measured in Environment Agency surveys of the Fleet was 16.9 cm, recorded at Girton on 22 May 2019.

Across 363 measured roach, the median measured length was 6.9 cm.

Surveyors recorded one individual weight: 0 oz (0.001 kg).

RiverFish uses Environment Agency survey measurements rather than rod-and-line angling records. These figures show fish measured during EA surveys of the Fleet.

See roach records across England →

Most recent observation20 June 2023Girton · 11 fish

Largest measured roach: 16.9 cm
Median length: 6.9 cm
Fish measured: 363
Survey locations: 2

Individual EA measurements

Largest measured roach

The largest individual measurements in this river and species dataset. Equal measurements are retained as separate surveyed fish.

Length	Survey date	Survey location	Survey ID
16.9 cm	22 May 2019	Girton	154509
16.5 cm	22 May 2019	Girton	154509
15.6 cm	22 May 2019	Girton	154509
14.3 cm	22 May 2019	Girton	154509
13.5 cm	22 May 2019	Girton	154509
13.5 cm	25 Jun 2015	Girton	145280
13.1 cm	22 May 2019	Girton	154509
13 cm	22 May 2019	Girton	154509
13 cm	22 May 2019	Girton	154509
13 cm	22 May 2019	Girton	154509

Lengths are direct survey measurements. RiverFish does not estimate fish weights from length.

Explore the river

Where roach were found

Each point marks a survey location with at least one roach record.

Choose a point on the map to see what was recorded there.

Map points are approximate and don’t show fishing access. Check local permissions before visiting.

Place surveyed	First recorded	Last recorded	Visits finding roach
Girton	17 Jun 2011	20 Jun 2023	6
US Weir	9 Jun 2011	9 Jun 2011	1

Choose a point or table row to see the location. More survey visits can mean more records, but not necessarily more fish.

2011–2023

Survey records by year

Each bar shows how many survey visits recorded roach that year.

211

012

113

014

115

016

117

018

119

020

021

022

123

Fish measured by surveyors

Measured length distribution

See how the 363 measured fish were spread across different length ranges.

Smallest: 3.4 cm
Lower quarter: 6 cm
Median: 6.9 cm
Upper quarter: 8.8 cm
Largest: 16.9 cm

0–99 mm

308

100–199 mm

Lengths are direct survey measurements rather than anglers’ catches.

Fish weighed by surveyors

Measured weight summary

One individual weight was recorded for this fish and river. This is a subset of the measured fish and may not represent the whole population.

Recorded weight: 0 oz (0.001 kg)

These are direct individual weights recorded by Environment Agency surveyors. Combined bulk weights are not included.

More fish in this river

Explore the Fleet

Compare other species with enough survey and measurement data for a detailed page.

European eel Spined loach Perch 3-spined stickleback Bullhead Gudgeon

Before you fish

Good to know

These are past survey records, so the fish present today may be different. Map points are approximate—check local access, permissions and fishing rules before visiting.

Learn how RiverFish uses the data →